Added possiblity to connect to redis via a unix socket (#1055)

* Added possiblity to connect to redis via a unix socket

* Improved redis via socket config usage and added config option to blueprints

* Updated Changelog

* Improved redis via socket by adding a default value and a placeholder in the blueprint

CHANGELOG.md

@@ -3,6 +3,7 @@
 
 1. [](#improved)
     * Add `batch()` function to Page Collection class
+    * Added new `cache.redis.socket` setting that allow to pass a UNIX socket as redis server
 
 # v1.1.5
 ## 09/09/2016

system/blueprints/config/system.yaml

@@ -515,6 +515,13 @@ form:
                     help: PLUGIN_ADMIN.MEMCACHED_PORT_HELP
                     placeholder: "11211"
 
+                cache.redis.socket:
+                    type: text
+                    size: medium
+                    label: PLUGIN_ADMIN.REDIS_SOCKET
+                    help: PLUGIN_ADMIN.REDIS_SOCKET_HELP
+                    placeholder: "/var/run/redis/redis.sock"
+
                 cache.redis.server:
                     type: text
                     size: medium

system/config/system.yaml

@@ -72,6 +72,8 @@ cache:
   prefix: 'g'                               # Cache prefix string (prevents cache conflicts)
   lifetime: 604800                          # Lifetime of cached data in seconds (0 = infinite)
   gzip: false                               # GZip compress the page output
+  redis:
+    socket: false                           # Path to redis unix socket (e.g. /var/run/redis/redis.sock), false = use server and port to connect
 
 twig:
   cache: true                               # Set to true to enable Twig caching

system/src/Grav/Common/Cache.php

@@ -196,8 +196,15 @@ public function getCacheDriver()
 
             case 'redis':
                 $redis = new \Redis();
-                $redis->connect($this->config->get('system.cache.redis.server', 'localhost'),
+                $socket = $this->config->get('system.cache.redis.socket', false);
+
+                if ($socket) {
+                    $redis->connect($socket);
+                } else {
+                    $redis->connect($this->config->get('system.cache.redis.server', 'localhost'),
                     $this->config->get('system.cache.redis.port', 6379));
+                }
+
                 $driver = new DoctrineCache\RedisCache();
                 $driver->setRedis($redis);
                 break;